Nitrobenzene degradation pathways and their interaction with sulfur and nitrogen transformations in horizontal subsurface flow constructed wetlands

作者: Wesley K. Kirui , Shubiau Wu , Ming Lei , Renjie Dong

DOI: 10.1016/J.ECOLENG.2015.07.021

关键词: AmmoniumEnvironmental chemistryChemistryAerationSulfurEnvironmental engineeringSubsurface flowNitrogenMineralization (biology)SulfateSulfide

摘要: Abstract Nitrobenzene (NB) degradation pathways and their interaction with sulfur nitrogen transformations in constructed wetlands are not fully understood. This study investigates the effectiveness of horizontal subsurface flow (HSSFCWs) NB biodegradation including microbial interactions. The investigation was based on two laboratory-scale planted Juncus effusus. One wetland intermittently aerated while other not. Data about were collected at varying influent loading rates [35 140 mg/L] for 120-day period. From results, both exhibited an overall performance 99% removal. More so, intermittent aeration did significantly improve but rather it enhanced buffer capacity to shock loading. result also demonstrates that mineralization account 96% 4% volatilization. Formation ammonium from increased concentration pore water. In unaerated wetland, 84 mg/L sulfide accumulated complex reaction involving sulfate as electron acceptor donor.

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